QIDI X-Plus Problems: Clogs, Cooling, Ribbon Cable, Leveling

The QIDI X-Plus is a fully enclosed FDM printer from 2019 with a 270×200×200 mm build volume, two swappable print heads (a standard one up to 250 °C and an all-metal high-temp one up to 300 °C), a heated bed up to 100 °C and a 4.3-inch touchscreen. It launched at around $600–899 and won people over with an enclosed chamber for cheap.

The printer has long been discontinued, but plenty are still running. Below are only the quirks that are specific to the X-Plus and how to live with them: head clogs, ribbon cable breaks, the two-head confusion, weak part cooling, an outdated slicer and manual leveling. General FDM problems (stringing, warping, first layer in general) are split into separate guides linked at the end.

1. Head clogs: heat creep and jams after idle time

The extruder starts clicking, filament skips or stops feeding — often on PLA or after the printer has sat idle for a couple of hours and cooled down. The feeder gear grinds a groove into the filament. The cause is heat creep: inside the enclosed chamber heat rises up the throat, and the filament softens before it reaches the melt zone. The X-Plus standard head is PTFE-lined and the feeder is single-gear, so it doesn't have the grip to push a soft plug through.

1. Print PLA with the door open and the top lid off — that's QIDI's own recommendation, so the chamber doesn't overheat and heat creep goes away.
2. Dry your filament — wet plastic foams and jams harder.
3. Do a cold pull: heat to printing temp, cool to ~90 °C and pull the plug out with the gunk.
4. If clogs keep coming back, replace the PTFE tube and nozzle (they're sold as a kit; the tube degrades with heat).
5. For high-temp materials switch to the all-metal head — no PTFE in the hot zone.

2. The hotend never works right after a clog teardown

This is a signature X-Plus problem: you take the head apart to clear a clog, put it back together, and it no longer works properly. Melt leaks past the threads, the temperature won't climb above ~175 °C, and the heater and thermocouple die. Owners on forums flat out say that once you take a hotend apart to clean a clog, it never seems to work right again.

1. Assemble the hotend hot: heat to 240–250 °C and snug the nozzle against the heatbreak so there's no gap.
2. If the temperature is wrong, jumps around or won't climb, replace the thermocouple and heater cartridge.
3. Keep a spare PTFE-lined nozzle and a complete hotend on hand — on this printer they're consumables.
4. Never force cold threads and don't over-tighten — brass and aluminum strip easily.

3. The print head ribbon cable breaks

The printer suddenly stops extruding, the temperature reads wrong, you get head communication errors, or it won't heat at all. The culprit is the thin ribbon cable that connects the head: it flexes constantly as the head moves along X, and the conductors crack right at the hotend. The flimsy connector latches also snap off during teardowns, so you end up removing it on tiptoe.

1. Inspect the cable at the hotend: kinks, cracks or darkened conductors are a dead giveaway.
2. Replace the extruder ribbon cable (1.5 m for the X-Plus).
3. If the comms error stays on both heads, the extruder adapter board is at fault — replace that too.
4. If you tear the head down often, move to more repairable connectors so you can swap the cable without fighting the latches.

4. Two heads and the PTFE temperature limit

It's important to understand: the X-Plus is not a dual extruder. It's one head that you swap by hand. The standard PTFE-lined head is limited to about 240–250 °C — above that the PTFE chars and crumbles right in the throat. For nylon, polycarbonate and carbon fiber you need the separate all-metal head with its own hardened nozzle. The two heads use different nozzles that aren't interchangeable — a brass M7 (MK10) for the standard head and a hardened one for the all-metal head.

1. PLA, PETG, ABS, TPU — standard head; nylon, PC, carbon fiber — all-metal head.
2. Don't run the standard head above 250 °C for long — the PTFE hates the heat.
3. Re-level the bed after EVERY head swap — the geometry shifts.
4. Don't mix up nozzles: brass is only for the standard head, hardened only for the all-metal head.

5. Weak part cooling (and none on the high-temp head)

Overhangs and bridges come out rough, small features slump, and PLA quality is mediocre at best. The stock duct on the standard head blows from a single 5015 fan and only from one side. The all-metal high-temp head has no part cooling fan at all — it's built for ABS and nylon, which barely need cooling. As one owner with 18 months on the machine puts it: it's no good for PLA, part cooling is nonexistent, you can really only run ABS on it.

1. Print PLA only on the standard head (the one with cooling), and slower.
2. Fit an upgraded duct from Printables: Gripen cools from several sides, Draken is for tough overhangs.
3. Swap the part cooling fan for a stronger blower — it noticeably helps.
4. ABS and ASA barely need cooling — run those in the enclosed chamber as intended.

6. The dated QIDI Print slicer and slow profiles

The bundled QIDI Print slicer is a fork of old Cura (version 6.5.4). It has few settings, and the stock profiles are very conservative: the same part took ~5.5 hours in QIDI Print versus ~2.5 hours in PrusaSlicer at the same quality and 0.15 mm layer height. It also has occasional bugs when printing over Wi-Fi.

1. You can stay on QIDI Print 6.5.4 but rewrite the profile with sane speeds and retraction.
2. Better, move to PrusaSlicer, OrcaSlicer or plain Cura: set a 270×200×200 mm bed, the start g-code and temperatures by hand.
3. Print from a USB stick rather than Wi-Fi if the network is flaky.
4. The new QIDISlicer (PrusaSlicer-based) does not support the original X-Plus — don't waste time on it.

7. Manual leveling and a first-layer gap that drifts

The X-Plus has no auto leveling. On a cold bed the gap is huge and prints won't stick; once it's hot the nozzle starts digging in — the bed expands as it heats to 100 °C and the gap shifts. The first few layers often skip and then even out. The on-screen Z-offset works, but it's slow — you can't really dial it in on the fly.

1. Always level on a HOT bed: heat it to printing temp and wait 5–10 minutes.
2. On screen go to Tool → Leveling: use normal (full) the first time, quick after; set the gap by paper drag until you feel slight friction.
3. Adjust physically with the allen screws under the bed after loosening the 8 mm lock nut, then re-tighten.
4. Fine-tune with Z-offset in small 0.05 mm steps while watching the first layer.
5. After a head swap — do it all over again.

8. A sluggish screen and a white screen after a firmware glitch

The X-Plus 4.3-inch touchscreen is resistive and responds reluctantly — leveling and loading/unloading filament feel awkward at first. Occasionally a failed update leaves the UI on a white screen. And the screen ribbon cable (800 mm) wears through over time, so the display starts flickering or going dark.

1. Press a bit longer and more firmly — it's resistive, a light tap won't register.
2. On a white screen, restore the UI: write the UI reset file to an SD card or USB stick and power the printer on with it.
3. If the screen flickers or goes dark, check and replace the screen ribbon cable.
4. On a total failure the screen is replaced as an assembly.

9. Thermocouple drift and overheating risk

The nozzle temperature jumps around or gets stuck high — owners have seen 318 °C on both heads at once. The thermocouple is to blame: over time it reads wrong. If it under-reports, the printer keeps heating, and that's an overheating risk.

1. Confirm thermal runaway protection is active in firmware.
2. Replace the thermocouple if the temperature reads wrong or jumps.
3. Check the thermocouple crimp and the adapter board — a bad contact also causes spikes.
4. Replace the thermocouple and heater once a year as preventive maintenance.

10. Ringing on walls and Z-banding

You see ringing (echo) near corners and sharp features, and horizontal banding up the Z height. It's worse at speed. The X-Plus print head is heavy (direct drive) and the feeder is single-gear, so inertia leaves ringing on the walls. The Z axis has no anti-backlash nuts, so there's play and the bed can droop if you disable the motors during a pause.

1. Lower print speed and acceleration — this printer isn't a racer by design.
2. Check belt tension and the eccentric nuts and rollers.
3. Lubricate the Z lead screws; make sure the bed isn't sagging.
4. Don't disable the Z motors during pauses, or the bed will drop under its own weight.

11. Unreliable Wi-Fi and Ethernet

The printer drops off the network, jobs don't arrive, and Wi-Fi printing glitches now and then. The firmware's network stack is shaky, and the X-Plus has no proper USB port for OctoPrint.

1. Print from a USB stick — it's the most reliable route on this printer.
2. Don't count on constant remote monitoring over the network.
3. If it lives in a farm, wire it up over Ethernet rather than Wi-Fi.

12. Warping and shrinkage of nylon and PC even in the enclosure

Larger polycarbonate and nylon parts lift at the corners even inside the enclosure, and nylon shrinks a lot on top of that. The X-Plus chamber is enclosed but not actively heated, and these plastics shrink hard and soak up moisture. The paradox: one owner never tamed nylon on the hot head (no cooling) and ended up printing it just fine on the standard head at 240 °C — but always with a brim.

1. Always print nylon and PC with a brim or a raft.
2. Dry nylon and PC thoroughly before printing — they drink moisture.
3. Keep the door and lid closed and pre-heat the chamber before you start.
4. Use a glue stick or a dedicated adhesive on the bed for better grip.

Reviving an old X-Plus in 2026

The X-Plus is discontinued, and QIDI has pulled it from its support and firmware pages. The QIDI Print 6.5.4 slicer still works, but the newer QIDISlicer doesn't support the original. Enthusiasts revive the printer in different ways: a DIY dual-sided cooling duct, a board swap (for example a BTT SKR Pro) together with a BLTouch probe and a third-party screen, or Klipper via an ST-Link programmer and a Raspberry Pi. Inside sits a fairly ordinary STM32F407ZET6 chip, so all of that is technically possible.

Quick diagnosis: symptom → cause → what to do

Spares worth keeping on the shelf

Since the printer is discontinued, it's smart to build a little kit of common parts up front — the things that wear out most often on the X-Plus:

Common 3D printing problems

Beyond the X-Plus-specific quirks, you'll run into the usual FDM problems. We've covered each one in its own detailed guide:

• First layer not sticking — the complete guide
• Nozzle clogs: causes and how to clear them
• Warping and corner lifting
• Stringing and oozing between parts
• Layer shifts and ringing on walls
• Under- and over-extrusion
• How to dry filament properly
• 3D printer maintenance

Also on QIDI: known issues of the QIDI X-Max (a sibling on the same platform), is a used QIDI X-series worth it in 2026, and the QIDI X-Plus 3 review if you're thinking about an upgrade.

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